Adafruit Si7021 Temperature & Humidity Sensor Breakout Board

The Si7021 Temperature + Humidity Sensor offers distinct precision with ±3% RH and ±0.4 °C accuracy, perfect for comprehensive environmental sensing projects. Covering a wide temperature range from -10 to +85 °C and a humidity scope of 0–80% RH, this sensor ensures reliable data collection.

Designed for seamless integration, it utilizes I2C for data transfer, compatible with a variety of microcontrollers. Our custom PCB in the STEMMA QT form factor simplifies connectivity, featuring STEMMA QT connectors that align with SparkFun Qwiic I2C standards for solderless connections.

Ideal for both 3.3V and 5V systems such as Raspberry Pi and Arduino Uno, thanks to integrated voltage regulation and level shifting. A PTFE filter protects the sensor, and the package includes pin headers, though light soldering is needed for breadboard use. Comprehensive tutorials are available for integration with Arduino or CircuitPython.